/**
  * @covers ::setPathAndUpdateDescendants
  * @covers ::updateDescendants
  * @covers ::getChildrenPath
  */
 public function testPath()
 {
     $root = Category::find(1);
     $sub = Category::find(6);
     $leaf1 = Category::find(7);
     $leaf2 = Category::find(8);
     $this->assertEquals('1', $root->getChildrenPath());
     $this->assertEquals('1/3/6', $sub->getChildrenPath());
     $sub->parentId = 2;
     $sub->setPathAndUpdateDescendants('1/2');
     Category::saveArray([$sub, $leaf1, $leaf2]);
     $this->assertEquals('1/2', $sub->path);
     $this->assertEquals('1/2/6', $sub->getChildrenPath());
     $this->assertEquals('1/2/6', $leaf1->path);
     $this->assertEquals('1/2/6', $leaf2->path);
     $sub->parentId = 0;
     $sub->setPathAndUpdateDescendants('');
     Category::saveArray([$sub, $leaf1, $leaf2]);
     $this->assertEquals('', $sub->path);
     $this->assertEquals('6', $leaf1->path);
     $this->assertEquals('6', $leaf2->path);
 }